The River Dender is a river located in Belgium, primarily flowing through the Flemish Region. It is approximately 60 kilometers long and is a tributary of the River Scheldt. The river passes through several towns, including Dendermonde, which is named after it. The Dender is known for its scenic landscapes and is a popular spot for outdoor activities such as cycling and walking. It plays an important role in the local ecosystem and supports various wildlife. The river also has historical significance, with several ancient structures and bridges along its banks.